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首页> 外文期刊>Chinese journal of aeronautics >Dynamic Response Analysis of Bird Strike on Aircraft Windshield Based on Damage-modified Nonlinear Viscoelastic Constitutive Relation
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Dynamic Response Analysis of Bird Strike on Aircraft Windshield Based on Damage-modified Nonlinear Viscoelastic Constitutive Relation

机译：基于损伤修正非线性粘弹本构关系的飞机挡风玻璃鸟击动态响应分析

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摘要

Damage-modified nonlinear viscoelastic constitutive equation and failure criterion are introduced and the three-dimensional incremental forms are deduced based on the updated Lagrangian approach. A simple tensile test model and a split Hopkinson pressure bar model are built to verify the accuracy of the subroutine implemented within the non-linear finite element program LS-DYNA. A numerical model of bird strike on windshield is established to study the responses of windshield under three different bird velocities at three sites. The bird is represented by a cylinder with a hemisphere at each end and the contact-impact coupling algorithm is used in this study. It is found that the implemented subroutine can properly describe the mechanical behavior of polymethyl methacrylate under low and high strain rates and large deformation, and can be used validly.
机译：介绍了损伤修正的非线性粘弹性本构方程和破坏准则，并基于更新的拉格朗日方法推导了三维增量形式。建立了一个简单的拉伸试验模型和一个霍普金森分裂压力棒模型，以验证非线性有限元程序LS-DYNA中实现的子程序的准确性。建立了挡风玻璃上鸟击的数值模型，以研究挡风玻璃在三个位置的三种不同鸟类速度下的响应。该鸟由一个在每个末端都有一个半球的圆柱体表示，并且在此研究中使用了接触-冲击耦合算法。发现所实现的子程序可以恰当地描述聚甲基丙烯酸甲酯在低应变率和高应变率以及大变形下的力学行为，并且可以有效地使用。

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